body,
html {
  line-height: 1;
  font-weight: 200;
  font-family: "PingFang SC", "Helvetica Neue", Helvetica, STHeiTi, Arial,
    sans-serif;
}
.clearfix{
  display: inline-block;
  &:after{
    display: block;
    content: '.';
    height: 0;
    line-height: 0;
    clear: both;
    visibility: hidden;
  }
}
